├── frontend
 │   └── index
 │      └── shop-navigation.tpl

{extends file="parent:frontend/index/shop-navigation.tpl"}

{block name='frontend_index_checkout_actions'}
<li class="navigation--entry">
    <a href="" class="btn starButton"> {* Add an URL to the href attribute to make your link work *}
        <i class="icon--star"></i>
    </a>
</li>

{$smarty.block.parent}
{/block}